package main

import (
	"fmt"
	"time"
)

var m = 100

func main() {
	fmt.Println(m)
	var a, b = 1, 2
	result, err := sum(a, b)
	if err == nil {
		fmt.Println(result)
	}
	fmt.Println(time.Now())
}

func sum(a int, b int) (int, error) {
	c := a + b
	return c, nil
}
